Two familiar faces no one on "Hawaii Five-0" would really want to see again are back for this week's season 4 finale, "'O ka Pili 'Ohana ka 'Oi," Hawaiian for "Family Comes First." On Sunday, May 4, CBS posted the promo teasing what to expect.

Best Possible Screen Grab/CBS, used with permission

In this next episode, both Ian Wright (Nick Jonas) and Wo Fat (Mark Dacascos) are back. Ian Wright, who escaped and was last seen in "Akanahe," kidnaps Grover's daughter, Samantha (Paige Hurd), and Grover (Chi McBride) is forced to help steal $100 million in order to get her back. Meanwhile, Wo Fat escapes prison and heads back to Oahu.

The "'O ka Pili 'Ohana ka 'Oi" promo is all about Ian taking Grover's daughter. "The man that you're with is a very dangerous fugitive. He's going to want to hurt you," Grover warns his daughter over the phone. "I need you to be strong." Ian tells him what he wants (and gives him one hour), and we later see Grover pinning him to the wall in Five-0 HQ. "Anything happens to my daughter, I'm going to kill you," Grover threatens.

We also see Grover and his men disarming the Five-0 team, and Grover tells McGarrett (Alex O'Loughlin), "I'm sorry, Steve. It's gotta be this way." Is that gun under McGarrett's chin part of how "it's gotta be"? What exactly did Ian tell Grover to do?

Plus, don't forget to check out the slideshow to see the promotional photos CBS has released from this episode. The photos offer a look at the Five-0 team with Grover on a golf course, Ian Wright and more.

Finally, the Cheat Tweet on the press release for this episode teases "a new member of 5-0." Is that going to be Grover because of his actions in this episode to get his daughter back?

"Hawaii Five-0" season 4 ends Friday at 9 p.m. on CBS. What do you think of the finale "'O ka Pili 'Ohana ka 'Oi" photos and promo?

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Meredith Jacobs, a freelance entertainment writer, is the go-to girl for television news. She has followed her favorite shows since their beginnings, and she's always ready to report the latest information as it's released. She never misses an episode and is always looking forward to what's to come the next week on her favorite series. Contact Meredith here.